1028686768 has 20 divisors (see below), whose sum is σ = 1994125840. Its totient is φ = 514073664.

The previous prime is 1028686751. The next prime is 1028686783. The reversal of 1028686768 is 8676868201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16621 + ... + 48307.

It is an arithmetic number, because the mean of its divisors is an integer number (99706292).

Almost surely, 2^1028686768 is an apocalyptic number.

It is an amenable number.

1028686768 is a deficient number, since it is larger than the sum of its proper divisors (965439072).

1028686768 is a wasteful number, since it uses less digits than its factorization.

1028686768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33724 (or 33718 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 52.

The square root of 1028686768 is about 32073.1471483545. The cubic root of 1028686768 is about 1009.4722492006.

The spelling of 1028686768 in words is "one billion, twenty-eight million, six hundred eighty-six thousand, seven hundred sixty-eight".